Sound quality of the nano headphones output - Page 3 at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > External Video Recording Solutions > Convergent Design Odyssey

Convergent Design Odyssey
...and other Convergent Design products.


Reply
 
Thread Tools Search this Thread
Old June 15th, 2010, 11:36 PM   #31
Inner Circle
 
Join Date: Aug 2006
Location: Poland
Posts: 4,086
This is a very good news indeed, Mike (I'm sure you mean -12/+12 dB).
__________________
Sony PXW-FS7 | DaVinci Resolve Studio; Magix Vegas Pro; i7-5960X CPU; 64 GB RAM; 2x GTX 1080 8GB GPU; Decklink 4K Extreme 12G; 4x 3TB WD Black in RAID 0; 1TB M.2 NVMe cache drive
Piotr Wozniacki is offline   Reply With Quote
Old June 16th, 2010, 07:44 AM   #32
Regular Crew
 
Join Date: Sep 2008
Location: Jacksonville, VT USA
Posts: 100
Ummmm, +/-12db isn't much. Let's hope Mike was correct about the greater range.

Jeff
Jeff Silverman is offline   Reply With Quote
Old June 16th, 2010, 08:54 AM   #33
Trustee
 
Join Date: Nov 2005
Location: Sydney Australia
Posts: 1,570
Can't one simply plug the headphones into the camera's headphone output, that has plenty of level control. Alternatively inline headphone volume controls are pretty cheap and more convenient than using something on a recording device like the NF. The less button pushing one has to do on a recorder such as the NF while it's recording the better in my opinion.
Bob Grant is offline   Reply With Quote
Old June 16th, 2010, 12:35 PM   #34
Regular Crew
 
Join Date: Sep 2008
Location: Jacksonville, VT USA
Posts: 100
Bob,

Fair enough, external controls are available. But did you remember to bring it? Did the client forget to send it back?

Monitoring the loop through on the recorder is also essential. Doing it on the camera verifies nothing.

Headphone volume control is a normal function of a record and playback deck. There is functionality built into the Nano for that. We are just waiting for CD to get it done and hope that their priorities for bug fixes and normal useful controls take the priority that they deserve (as they seem to have lately).

Jeff
Jeff Silverman is offline   Reply With Quote
Old June 16th, 2010, 01:23 PM   #35
Inner Circle
 
Join Date: Aug 2006
Location: Poland
Posts: 4,086
Quote:
Originally Posted by Bob Grant View Post
Can't one simply plug the headphones into the camera's headphone output, that has plenty of level control. Alternatively inline headphone volume controls are pretty cheap and more convenient than using something on a recording device like the NF. The less button pushing one has to do on a recorder such as the NF while it's recording the better in my opinion.
Bob, I beg to disagree. I may be wrong, but not many professional headsets have inline volume control. But what's most important is that - when with the future firmware, the nanoFlash effectively becomes a sort of mixer for the SDI-embedded channels and the analogue one(s) - the ability to precisely monitor the audio directly from the nF will become indispensable.
__________________
Sony PXW-FS7 | DaVinci Resolve Studio; Magix Vegas Pro; i7-5960X CPU; 64 GB RAM; 2x GTX 1080 8GB GPU; Decklink 4K Extreme 12G; 4x 3TB WD Black in RAID 0; 1TB M.2 NVMe cache drive
Piotr Wozniacki is offline   Reply With Quote
Old June 16th, 2010, 02:43 PM   #36
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,413
Dear Friends,

I am building on Bob's thoughts.

We are committed to providing a greater range of headphone level output.

But, as Bob, said, a simple 3.5mm mini-Plug to level control to 3.5 mm mini-Jack are available and very convenient.

In fact, much more convenient than a headphone level control will ever be on the nanoFlash using push buttons.

Bob's comment about pushing less buttons, while recording, makes perfect sense to me, especially if the nanoFlash is mounted on the camera. We are already using the arrow buttons to control the input levels, for analog audio inputs, which are there if the levels are too high or low during a recording.
__________________
Dan Keaton
Augusta Georgia

Last edited by Dan Keaton; June 16th, 2010 at 10:07 PM.
Dan Keaton is offline   Reply With Quote
Old June 16th, 2010, 08:23 PM   #37
Convergent Design
 
Join Date: Apr 2005
Location: Colorado Springs, CO
Posts: 869
Audio Level Settings

I double checked the audio chip spec and it certainly appears that we can add +12 to -120 dB gain to the headphone output. We have the demo board and should be able to confirm next week (after we get the next beta release checked out).

Best-
__________________
Mike Schell
Convergent Design
Mike Schell is offline   Reply With Quote
Old June 16th, 2010, 10:21 PM   #38
Trustee
 
Join Date: Oct 2009
Location: Rhinelander, WI
Posts: 1,209
Quote:
Originally Posted by Mike Schell View Post
certainly appears that we can add +12 to -120 dB gain
Very well, then. Sounds good.

So, how many bits are we recording the sound at? Just wondering because of these little facts. That would equate -120 dB with hitting the mute button. But then going from there up in 0.5 dB increments?
Adam Stanislav is offline   Reply With Quote
Old June 16th, 2010, 11:07 PM   #39
Inner Circle
 
Join Date: Dec 2002
Location: Augusta Georgia
Posts: 5,413
Dear Adam,

Audio in the nanoFlash is recorded in the 24-bit 48,000 samples per second format.

The embedded audio, from the source, may be in 16-bit or 24-bit format, depending on the camera.

Analog audio is always encoded using 24-Bit hardware.
__________________
Dan Keaton
Augusta Georgia
Dan Keaton is offline   Reply With Quote
Old June 16th, 2010, 11:46 PM   #40
Trustee
 
Join Date: Oct 2009
Location: Rhinelander, WI
Posts: 1,209
Thanks, Dan. So, theoretically, there is room for more than 120 dB, though that would be quite a roar. :)

Personally, I have always wished the digital standard was to record the sound in a logarithmic way, so that soft sounds could record more subtle differences. Alas, the accepted standard is linear, even though deciBels are indeed logarithmic.
Adam Stanislav is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > The Tools of DV and HD Production > External Video Recording Solutions > Convergent Design Odyssey

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 07:40 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network